Connected: An Internet Encyclopedia
RFC 1510 - 2.1. Initial and pre-authenticated tickets

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### 2.1. Initial and pre-authenticated tickets

The INITIAL flag indicates that a ticket was issued using the AS protocol and not issued based on a ticket-granting ticket. Application servers that want to require the knowledge of a client's secret key (e.g., a passwordchanging program) can insist that this flag be set in any tickets they accept, and thus be assured that the client's key was recently presented to the application client.

The PRE-AUTHENT and HW-AUTHENT flags provide addition information about the initial authentication, regardless of whether the current ticket was issued directly (in which case INITIAL will also be set) or issued on the basis of a ticket-granting ticket (in which case the INITIAL flag is clear, but the PRE-AUTHENT and HW-AUTHENT flags are carried forward from the ticket-granting ticket).

Next: 2.2. Invalid tickets

Connected: An Internet Encyclopedia
RFC 1510 - 2.1. Initial and pre-authenticated tickets